One Last Optional Upgrade For The Kit You Just Bought
KDPEasy Activity Book PDF Builder · for the kit you just bought
A separate small app that runs in your browser. It does the repeated page steps for you and shows your final KDP page count before you upload.
You can build the interior PDF yourself in Canva, with the guide you already have. It works, and for one short book it may be all you need.
This app is for the moment the book gets long, or you start making another one. It does the repeated steps for you.
Same pictures. Same book.
The same PDF, without placing every page by hand.
Place a picture. Set its margin. Add a blank back. Count the pages. A book of 80 or 120 pictures means doing that 80 or 120 times.
The thicker the book, the more room KDP asks for next to the spine. Your pictures have to get a little narrower to stay clear of it, and you have to work that out from the page count.
KDP recommends images at 300 DPI and calls anything under 200 DPI low resolution. A ChatGPT picture placed straight on an 8.5 in page lands near 130.
With a blank back after every picture, a title page and a copyright page, 40 pictures make 82 pages. Working that out for every book is easy to get wrong.
The kit you have already writes the prompts for your pictures.
The PDF Builder helps you turn those pictures into the inside of your book.
Your pictures in. One interior PDF out.
A small app that builds one interior PDF from the pictures you made.
It works best with the book file your kit saves, and it also works without one. Pictures stay on your computer. Nothing is uploaded.
Open the file, drop in your pictures, type your title, build.
Click “Open book file…” and choose the file your kit saved with “Save book file”. It fills in the page size, the number of pages you planned and each page’s title. No book file? Choose 8.5 x 8.5 in or 8.5 x 11 in by hand.
Drop in your PNG or JPG pictures. ChatGPT names its files by date and time, so the app puts them in that order and matches them to your plan, page by page. Each picture is a numbered card. Move one earlier or later, preview how the page will print, or remove it. The app tells you if you have too few or too many pictures.
Type your book title, an optional subtitle, your name or publisher name and the year. Add an extra copyright line if you like. The text is printed exactly as you type it.
Check the summary, then click “Build PDF”. You get one PDF named after your book title. Open it and look at the first pages and a few pictures before you upload it to KDP.
With a blank back after every picture, a title page and a copyright page, KDP pages = 2 + 2 × pictures.
| Pictures | KDP pages | Inside margin | Picture width |
|---|---|---|---|
| 40 | 82 | 0.375 in | 100% of the page width |
| 80 | 162 | 0.5 in | 96% of the page width |
| 120 | 242 | 0.5 in | 96% of the page width |
The inside margin KDP asks for grows with the page count, from 0.375 in up to 150 pages to 0.875 in near the 828-page limit, and the app narrows your pictures to match. These numbers follow KDP’s help pages as read on 2026-11-03. KDP can change them, so check KDP when you publish.
If you turn the blank backs off, KDP pages = 2 + the number of pictures, and KDP rounds an odd count up to even.
For one short book, the Canva guide you already have may be all you need.
One small download. No key.
After you click yes, the next page links a small ZIP file (about 27 KB) with the app and a README.txt that explains every step.
Right-click the ZIP and choose Extract All, then double-click index.html in the extracted folder. It opens in your web browser. It will not run from inside the ZIP.
Open your book file, add your pictures, type your title and click Build PDF. A long book takes time and memory, so close your other tabs and give it a few minutes if it is big.
No. You can build the PDF in Canva with the guide you already have. This app does the repeated steps for you.
After you order, the next page links a ZIP. Extract it, open index.html and follow the README.
No. It is a separate app with its own download.
It works best with the book file the kit saves, using the “Save book file” button. It also works without one: add your pictures and choose the page size by hand.
No. It works offline and nothing is uploaded. Your pictures stay on your computer.
No. It builds the inside of the book from the pictures you give it.
8.5 x 8.5 in and 8.5 x 11 in, with no bleed. These are the same two sizes as the kit.
KDP’s limits apply: at least 24 pages in the book, and at most 590 pages on 8.5 x 11 in and 828 pages on 8.5 x 8.5 in. The app tells you.
Black-and-white line art that has to be enlarged is cleaned up and sharpened. It cannot add detail that was never in the picture, so a printed proof copy is still a good idea.
Every page is built at 300 DPI, which is what KDP recommends. KDP counts pixels divided by printed size. The detail still comes from your ChatGPT picture, about 130 DPI at full page width, so the app sharpens line art but cannot add detail.
It depends on the book and on your computer. A short test book took seconds, and a long book takes minutes.
KDP reviews every book itself. The app follows KDP’s published margin and page rules as read on 2026-11-03. Check KDP’s help pages when you publish.
Yes. Without a book file, add your pictures and choose the page size by hand.
Yes. The books you make are yours to publish and sell. You may not resell, share or give away the app.
30 days, 100 percent money back. Email daodinhthe1989@gmail.com within 30 days.
One-time $57. No subscription.
One-time purchase. Added to the order you just placed.
Try the PDF Builder with your own pictures. If it is not for you, email within 30 days for a full refund. Your kit and your bonuses stay yours.
If you have any questions or need a hand with anything, feel free to drop me a message at daodinhthe1989@gmail.com - I'm always happy to help!
All the best,
Lucky Smith